US7030543B2 - Reflector lamp having reduced seal temperature - Google Patents

Reflector lamp having reduced seal temperature Download PDF

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Publication number
US7030543B2
US7030543B2 US10/785,611 US78561104A US7030543B2 US 7030543 B2 US7030543 B2 US 7030543B2 US 78561104 A US78561104 A US 78561104A US 7030543 B2 US7030543 B2 US 7030543B2
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US
United States
Prior art keywords
reflector lamp
reflector
outer jacket
light absorbing
electrode seal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related, expires
Application number
US10/785,611
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English (en)
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US20050184632A1 (en
Inventor
Miguel Galvez
Walter P. Lapatovich
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Osram Sylvania Inc
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Osram Sylvania Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Osram Sylvania Inc filed Critical Osram Sylvania Inc
Assigned to OSRAM SYLVANIA INC. reassignment OSRAM SYLVANIA INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: GALVEZ, MIGUEL, LAPATOVICH, WALTER P.
Priority to US10/785,611 priority Critical patent/US7030543B2/en
Priority to CA002489226A priority patent/CA2489226A1/en
Priority to GB0502510A priority patent/GB2411518B/en
Priority to DE200510007092 priority patent/DE102005007092A1/de
Priority to NL1028363A priority patent/NL1028363C1/nl
Priority to HU0500240A priority patent/HUP0500240A2/hu
Priority to JP2005048806A priority patent/JP4950427B2/ja
Publication of US20050184632A1 publication Critical patent/US20050184632A1/en
Publication of US7030543B2 publication Critical patent/US7030543B2/en
Application granted granted Critical
Assigned to OSRAM SYLVANIA INC. reassignment OSRAM SYLVANIA INC. MERGER (SEE DOCUMENT FOR DETAILS). Assignors: OSRAM SYLVANIA INC.
Expired - Fee Related legal-status Critical Current
Adjusted expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/30—Vessels; Containers
    • H01J61/34—Double-wall vessels or containers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/30—Vessels; Containers
    • H01J61/35—Vessels; Containers provided with coatings on the walls thereof; Selection of materials for the coatings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J5/00—Details relating to vessels or to leading-in conductors common to two or more basic types of discharge tubes or lamps
    • H01J5/50—Means forming part of the tube or lamps for the purpose of providing electrical connection to it
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/52—Cooling arrangements; Heating arrangements; Means for circulating gas or vapour within the discharge space

Definitions

  • the present invention is related to light sources that are mounted within a reflector body. More particularly, this invention is related to reflector lamps having a ceramic metal halide light source.
  • Ceramic metal halide light sources are comprised of a ceramic discharge vessel (commonly referred to as an arc tube) that is generally made of polycrystalline-alumina.
  • Typical metal halide fills may include mercury, alkali- and alkaline-earth iodides, in particular NaI and CaI 2 , and rare-earth iodides such as DyI 3 , TmI 3 and HoI 3 .
  • Xenon or argon are typical gas fills.
  • Tungsten electrodes are used to generate an arc within the discharge vessel. Because electrical power must be supplied to the electrodes, the electrode assemblies must extend through the arc tube wall.
  • capillary tubes hold the electrode assemblies and a frit material is used to form a hermetic seal between the electrode assembly and its respective capillary.
  • the ceramic arc tube is often jacketed in another envelope, called an outer jacket, to protect the metal parts from oxidation.
  • outer jackets are usually thermally isolated from the arc tube and contain a vacuum or are filled with a partial pressure of an inert gas and a getter material, e.g., an aluminum or zirconium compound, to getter hydrogen and oxygen.
  • ceramic metal halide light sources have become increasingly favored because of their efficiency and color rendering properties.
  • the applications for ceramic metal halide light sources have expanded into traditional incandescent lighting applications, such as parabolic reflector (PAR) lamps, which must be adapted to accommodate these high-intensity, high-temperature light sources.
  • PAR parabolic reflector
  • a typical failure mode for ceramic metal halide sources occurs as a result of chemical attack by the metal halide fills on the frit materials used to make the electrode seals.
  • this problem is exacerbated because some of the emitted visible radiation is reflected back onto the ceramic metal halide source, and in particular, the electrode seal located in the neck portion of the reflector.
  • the construction of the electrode assembly and the seal make it a particularly good absorber of visible light.
  • the absorbed energy causes the electrode seal to overheat which in turn increases the rate of chemical attack by the fill on the seal leading to premature lamp failure. Therefore, it would be advantageous to keep the electrode seal from overheating in order to extend the operating life of the lamp. It would be a further advantage to accomplish this without significantly affecting the performance or cosmetic appearance of the reflector lamp.
  • the present invention is a reflector lamp having a ceramic metal halide light source wherein a particular portion of the outer jacket of the ceramic metal halide source is provided with a light absorbing layer. Light reflected within the neck cavity of the reflector lamp impinges on the light absorbing layer and is absorbed before it can reach the electrode seal which is located at least partially in the neck cavity of the reflector lamp. The absorbed light raises the temperature of the outer jacket, but not the electrode seal. The heat generated by the absorbed light is conducted into the base of the reflector lamp to be dissipated in the socket.
  • the temperature of the electrode seal during operation of the reflector lamp is at least about 50° C. lower than the temperature would have been if the lamp were constructed without the light absorbing layer on the outer jacket.
  • This invention is particularly applicable to those discharge vessels which have elongated seal structures.
  • FIG. 1 is a cross-sectional view of a preferred embodiment of the reflector lamp of this invention.
  • FIG. 2 is a side view of the light source of the reflector lamp shown in FIG. 1 .
  • FIG. 1 is a cross-sectional view of a preferred embodiment of the reflector lamp of this invention.
  • the reflector lamp is comprised of reflector body 10 and light source 12 .
  • a lens 40 may or may not be attached to the forward edge of the reflector to enclose the light source 12 within the reflector body 10 .
  • the lens may be fused, glued, or similarly coupled to the reflector body as is known in the art.
  • the reflector body 10 is comprised of concave shell 29 and neck 24 which defines neck cavity 6 .
  • the shell 29 surrounds the light source 12 to reflect light from the light source 12 onto a field to be illuminated during lamp operation.
  • the reflector body 10 has a reflective surface 11 to reflect the light emitted from light source 12 .
  • the reflective surface 11 is preferably formed by applying a reflective coating 22 to the reflector body's inner surface 25 .
  • the reflective coating 22 substantially covers the inner surface 25 including the neck 24 of the reflector body 10 .
  • the inner surface 25 of the reflector has been aluminized or silvered to provide the reflective coating.
  • Other typical reflective coatings include multi-layer dichroic coatings which are designed to reflect only certain portions of the spectrum of light emitted from the light source.
  • the reflector body is rotationally symmetric about a reflector axis 28 .
  • the concave shell may have a parabolic, elliptical or other similar optically functional cross section.
  • the inner surface 25 of the reflector body 10 may be smooth, faceted or otherwise contoured to reflect the light in a preferred direction to yield a desired beam pattern.
  • the neck 24 of reflector body 10 is provided with an electrical connection or connections 30 for providing power to light source 12 ; and a mechanical support or supports, which may be the same as the electrical connections.
  • the mechanical support holds light source 12 such that the axis 18 of the light source is substantially co-axial with the reflector axis 28 .
  • the light source 12 is a ceramic metal halide source comprised of a double-ended discharge vessel 7 having an axially symmetric body 14 with two capillaries 3 , 5 extending outwardly from the body 14 in opposite directions along axis 18 .
  • the axially symmetric body 14 defines an arc discharge cavity 4 .
  • the body 14 has the shape of a right circular cylinder.
  • other known shapes include spheroid geometries such as the one described in U.S. Pat. No. 5,936,351.
  • the discharge vessel 7 is composed of a polycrystalline alumina.
  • Other ceramic vessels are feasible, e.g., yttrium aluminum garnet.
  • Each capillary 3 , 5 of the discharge vessel 7 contains an electrode assembly 26 which passes through it. Electrode seals 8 , 9 are used to hermetically seal the electrode assembly 26 to its respective capillary 3 , 5 .
  • the electrode assembly is usually composed of multiple metal sections, viz. niobium, molybdenum wire coiled on a molybdenum mandrel, and a tungsten rod with a tungsten coil at its end.
  • the electrode seals are formed with a frit material which is a lower melting temperature ceramic composition, e.g., Al 2 O 3 , Dy 2 O 3 , and SiO 2 .
  • the coefficient of thermal expansion of the polycrystalline alumina, frit, and niobium are similar to minimize thermal stress in the seals.
  • the frit is melted during a sealing operation and covers about 5 mm of the electrode assembly, including 3 mm of the niobium and 2 mm of the molybdenum coil on the molybdenum mandrel. It is the tight winding of the Mo wire over the Mo mandrel that provides a good absorber of visible light. Details of various electrode structures and seals are described in U.S. Pat. No. 5,424,609.
  • the electrode assemblies protrude into discharge cavity 4 for the purpose of striking an electric arc between the opposing ends of the two electrode assemblies.
  • the discharge cavity 4 contains mercury, a metal halide fill and a buffer gas.
  • the metal halide fill typically comprises 5–10 mg of a mixture of metal halide salts, e.g., NaI, CaI 2 , HoI 3 , DyI 3 , and TmI 3 .
  • the buffer gas may be Ar, Kr, Xe, or a mixture thereof, with a fill pressure of 10 to 400 torr.
  • Outer jacket 33 is transparent to visible light and is constructed of glass, e.g., fused silica (quartz) or an aluminosilicate glass.
  • outer jacket 33 has a tubular shape which is closed at both ends.
  • the upper end 35 of the outer jacket is domed and the base end 39 contains press seal 37 .
  • the electrical leads 45 are connected to the external portion of the electrode assemblies 26 .
  • the leads 45 are welded to molybdenum foils 47 which are in turn welded to electrical connections 30 thereby providing a conductive path for connecting the light source 12 to an external power source (not shown).
  • the molybdenum foils 47 are sealed within press seal 37 to provide a closed environment within the outer jacket 33 .
  • Eyelets may be located in the base of the neck to duct the electrical connections through the reflector body. The electrical connections may then be soldered in place.
  • the outer jacket 33 may have a vacuum environment or be filled with a gas such as nitrogen gas. Filing the outer jacket with nitrogen gas has the effect of cooling the seal area, but it also cools the rest of the discharge vessel resulting in an undesirable color shift in the light output.
  • Light source 12 is oriented so that the base end 39 of outer jacket 33 is situated within the neck cavity 6 of the reflector body 10 . Consequently, an end of the discharge vessel 7 containing an electrode seal, in this case defined by capillary 3 and electrode seal 8 , is also at least partially situated within the neck cavity 6 .
  • an end of the discharge vessel 7 containing an electrode seal in this case defined by capillary 3 and electrode seal 8 , is also at least partially situated within the neck cavity 6 .
  • a region of the outer jacket 33 adjacent to the electrode seal 8 is provided with light absorbing layer 15 which masks the electrode seal 8 from reflected radiation 2 within the neck cavity. Since the amount of radiation reaching the electrode seal in the neck cavity is reduced, the temperature of the electrode seal is lower.
  • the light absorbing layer 15 is continuous and extends circumferentially around the outer jacket 33 and lengthwise towards base end 39 from a point between 0.1 to 2 mm below the body 14 of the discharge vessel 7 covering the length of capillary 3 . More preferably, the light absorbing layer starts 1 mm below the body 14 of the discharge vessel 7 so as not to interfere with the light gathering power of the reflector lamp.
  • the placement of the light absorbing layer 15 may be better observed in FIG. 2 which is a side view of the light source 12 without the reflector body.
  • the distance D represents an offset between the lower boundary 50 of the body 14 of discharge vessel 7 and the beginning edge 52 of the light absorbing layer 15 . As stated above, this distance D is preferably 0.1 mm to 2 mm and more preferably 1 mm.
  • the light absorbing layer 15 is preferably opaque and may be formed as an integral part of the glass outer jacket 33 , e.g., dyeing or impregnating a region of the glass outer jacket with ions to alter the light absorbing properties of the glass, or incorporating a section of an opaque glass in the transparent outer jacket.
  • the light absorbing layer 15 may be applied by brushing, spraying, dipping, electroplating, silk-screening or deposited by CVD or PCVD.
  • the light absorbing layer 15 is applied as an opaque coating to the exterior surface of the jacket as shown in FIGS. 1 and 2 .
  • the opaque coating comprises a refractory light-absorptive paint such as the automotive blacktop coating which is commonly used on the tips of halogen headlamps to control glare. Examples of the automotive blacktop coating may be found in U.S. Pat. Nos. 3,784,861 and 4,288,713. When cured, the black top coating forms a matte, dark gray or black surface.
  • Such blacktop compounds may consist for example of an emulsion of Kaolin clay, silicon powder, aluminum phosphate and water, which cures to a durable coating upon baking.
  • Other formulations may contain silicon, carbon, and iron powders dispersed in butanol and glycerin.
  • the coating may be a high-temperature black paint capable of 315° C. (600° F.) continuous operation, for example Krylon BBQ and Stove paint, sold by Sherwin Williams of Cleveland, Ohio.
  • the neutral gray or black absorptive coatings have very little reflection in the visible and so do not alter the color of the primary beam by scattering selective wavelengths.
  • the effectiveness of the light absorbing layer at reducing the temperature of the electrode seal in the neck cavity was measured by operating two groups of 70W PAR30 ceramic metal halide lamps in a vertical, base-up orientation.
  • the first group consisted of control lamps that did not have the light absorbing layer on the outer jacket.
  • the second group of lamps were fabricated according to this invention.
  • the light absorbing layer was an automotive blacktop coating that had been painted onto the exterior surface of the outer jacket. A stripe about 3 mm wide and parallel to the capillary was removed to permit infrared viewing of the seal area in order to measure its temperature.
  • the temperature of the electrode seal in the neck cavity of the PAR 30 lamps was reduced by about 50° C. from about 890° C. to about 840° C. by the addition of the light absorbing layer to the outer jacket.
  • the cosmetic appearance of the reflector lamp is less affected.

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
US10/785,611 2004-02-24 2004-02-24 Reflector lamp having reduced seal temperature Expired - Fee Related US7030543B2 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
US10/785,611 US7030543B2 (en) 2004-02-24 2004-02-24 Reflector lamp having reduced seal temperature
CA002489226A CA2489226A1 (en) 2004-02-24 2004-12-06 Reflector lamp having reduced seal temperature
GB0502510A GB2411518B (en) 2004-02-24 2005-02-07 Reflector lamp having reduced seal temperature
DE200510007092 DE102005007092A1 (de) 2004-02-24 2005-02-16 Reflektorlampe mit reduzierter Abdichtungstempertur
NL1028363A NL1028363C1 (nl) 2004-02-24 2005-02-22 Reflectorlamp waarbij de temperatuur van de afdichting gereduceerd is.
HU0500240A HUP0500240A2 (hu) 2004-02-24 2005-02-23 Fényszóró lámpa csökkentett forrasz hőmérséklettel
JP2005048806A JP4950427B2 (ja) 2004-02-24 2005-02-24 低減されたシール温度を有する反射形ランプ

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US10/785,611 US7030543B2 (en) 2004-02-24 2004-02-24 Reflector lamp having reduced seal temperature

Publications (2)

Publication Number Publication Date
US20050184632A1 US20050184632A1 (en) 2005-08-25
US7030543B2 true US7030543B2 (en) 2006-04-18

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Application Number Title Priority Date Filing Date
US10/785,611 Expired - Fee Related US7030543B2 (en) 2004-02-24 2004-02-24 Reflector lamp having reduced seal temperature

Country Status (7)

Country Link
US (1) US7030543B2 (de)
JP (1) JP4950427B2 (de)
CA (1) CA2489226A1 (de)
DE (1) DE102005007092A1 (de)
GB (1) GB2411518B (de)
HU (1) HUP0500240A2 (de)
NL (1) NL1028363C1 (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080074024A1 (en) * 2006-09-27 2008-03-27 Kling Michael R Compact PAR lamp
US20080224614A1 (en) * 2005-11-14 2008-09-18 Koninklijke Philips Electronics, N.V. Looped Frame Arc Tube Mounting Assembly for Metal Halide Lamp
US20080239743A1 (en) * 2007-03-29 2008-10-02 Magna International Inc. Headlamp assembly with isolated optics chamber
WO2009042047A1 (en) * 2007-09-27 2009-04-02 Osram Gesellschaft mit beschränkter Haftung Metal halide reflector lamp with beam color homogenizer
DE102010060678A1 (de) 2009-11-20 2011-05-26 Osram Sylvania Inc., Danvers Verfahren und Gasentladungslampe mit Filter zum Kontrollieren von Chromatizitäts-Drift während Dimmens
CN102200256A (zh) * 2010-03-26 2011-09-28 霍尼韦尔国际公司 同轴准直器反射镜
DE102011002308A1 (de) 2010-04-29 2011-11-03 Osram Sylvania Inc. Technik zum Steuern der Lichtleistung mittels Abschätzens der Lampenleuchtstärke als Funktion von Temperatur und Leistung

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US7595583B2 (en) * 2004-02-25 2009-09-29 Panasonic Corporation Cold-cathode fluorescent lamp and backlight unit
US7125149B2 (en) * 2004-03-15 2006-10-24 Osram Sylvania Inc. Reflector lamp with reduced seal temperature
JP4547331B2 (ja) * 2005-12-28 2010-09-22 パナソニック株式会社 照明装置及び金属蒸気放電ランプ
US7772750B2 (en) * 2006-08-24 2010-08-10 General Electric Company Large PAR lamp exhibiting excellent color with improved efficacy and life
EP1921664A1 (de) * 2006-11-09 2008-05-14 Koninklijke Philips Electronics N.V. Elektrische Lampe mit lichtabsorbierender Beschichtung, Ausgangsmischung für eine solche Beschichtung und Verfahren zur Herstellung einer solchen Lampe
DE102007045079A1 (de) * 2007-09-21 2009-04-02 Osram Gesellschaft mit beschränkter Haftung Hochdruckentladungslampe
CN101828248B (zh) * 2007-10-19 2012-02-22 奥斯兰姆有限公司 高压放电灯
AT506273B1 (de) * 2007-12-20 2012-03-15 Siemens Ag Verfahren zum betreiben eines schaltwandlers
US7952282B2 (en) * 2008-04-29 2011-05-31 Osram Sylvania Inc. Brazing alloy and ceramic discharge lamp employing same
US8686643B2 (en) * 2010-11-02 2014-04-01 Abl Ip Holding Llc System and method for reducing lamp restrike time
CN110268799B (zh) * 2017-01-24 2021-08-27 索拉劳尼克斯股份有限公司 用于红外灯的陶瓷反射器

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3784861A (en) 1971-02-25 1974-01-08 Philips Corp Lamp with opaque screen
US4288713A (en) 1979-11-23 1981-09-08 Gte Products Corporation Lamp having opaque coating
JPH01107402A (ja) 1987-10-21 1989-04-25 Toshiba Electric Equip Corp 照明器具
US5424609A (en) 1992-09-08 1995-06-13 U.S. Philips Corporation High-pressure discharge lamp
US5646471A (en) 1994-05-10 1997-07-08 U.S. Philips Corporation Capped high-pressure discharge lamp
JPH11111037A (ja) 1997-09-30 1999-04-23 Toshiba Lighting & Technology Corp 電球および照明装置
US5936351A (en) 1996-11-07 1999-08-10 Osram Sylvania Inc. Ceramic discharge vessel
JP2001023427A (ja) 1999-07-09 2001-01-26 Stanley Electric Co Ltd 放電灯装置及び車両用前照灯
US20030193280A1 (en) * 2002-04-11 2003-10-16 Lapatovich Walter P. Par lamp with reduced lamp seal temperature

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH076477Y2 (ja) * 1989-10-28 1995-02-15 立川ブラインド工業株式会社 横型ブラインド
JPH1083793A (ja) * 1996-09-11 1998-03-31 Toshiba Lighting & Technol Corp 高圧放電ランプおよび照明装置
JP4526204B2 (ja) * 2001-04-20 2010-08-18 スタンレー電気株式会社 小型放電灯
JP2004031153A (ja) * 2002-06-26 2004-01-29 Matsushita Electric Ind Co Ltd 高圧水銀ランプおよびランプユニット

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3784861A (en) 1971-02-25 1974-01-08 Philips Corp Lamp with opaque screen
US4288713A (en) 1979-11-23 1981-09-08 Gte Products Corporation Lamp having opaque coating
JPH01107402A (ja) 1987-10-21 1989-04-25 Toshiba Electric Equip Corp 照明器具
US5424609A (en) 1992-09-08 1995-06-13 U.S. Philips Corporation High-pressure discharge lamp
US5646471A (en) 1994-05-10 1997-07-08 U.S. Philips Corporation Capped high-pressure discharge lamp
US5936351A (en) 1996-11-07 1999-08-10 Osram Sylvania Inc. Ceramic discharge vessel
JPH11111037A (ja) 1997-09-30 1999-04-23 Toshiba Lighting & Technology Corp 電球および照明装置
JP2001023427A (ja) 1999-07-09 2001-01-26 Stanley Electric Co Ltd 放電灯装置及び車両用前照灯
US20030193280A1 (en) * 2002-04-11 2003-10-16 Lapatovich Walter P. Par lamp with reduced lamp seal temperature

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080224614A1 (en) * 2005-11-14 2008-09-18 Koninklijke Philips Electronics, N.V. Looped Frame Arc Tube Mounting Assembly for Metal Halide Lamp
US20080074024A1 (en) * 2006-09-27 2008-03-27 Kling Michael R Compact PAR lamp
US7518299B2 (en) * 2006-09-27 2009-04-14 Osram Sylvania Inc. Compact PAR lamp comprising an ellipsoid reflector having more than one focal point
US20080239743A1 (en) * 2007-03-29 2008-10-02 Magna International Inc. Headlamp assembly with isolated optics chamber
US7806572B2 (en) * 2007-03-29 2010-10-05 Magna International Inc. Headlamp assembly with isolated optics chamber
WO2009042047A1 (en) * 2007-09-27 2009-04-02 Osram Gesellschaft mit beschränkter Haftung Metal halide reflector lamp with beam color homogenizer
DE102010060678A1 (de) 2009-11-20 2011-05-26 Osram Sylvania Inc., Danvers Verfahren und Gasentladungslampe mit Filter zum Kontrollieren von Chromatizitäts-Drift während Dimmens
US20110121759A1 (en) * 2009-11-20 2011-05-26 Osram Sylvania Inc. Method and gas discharge lamp with filter to control chromaticity drift during dimming
US8198823B2 (en) 2009-11-20 2012-06-12 Osram Sylvania Inc. Method and gas discharge lamp with filter to control chromaticity drift during dimming
CN102200256A (zh) * 2010-03-26 2011-09-28 霍尼韦尔国际公司 同轴准直器反射镜
CN102200256B (zh) * 2010-03-26 2014-10-22 霍尼韦尔国际公司 同轴准直器反射镜
DE102011002308A1 (de) 2010-04-29 2011-11-03 Osram Sylvania Inc. Technik zum Steuern der Lichtleistung mittels Abschätzens der Lampenleuchtstärke als Funktion von Temperatur und Leistung
US8378594B2 (en) 2010-04-29 2013-02-19 Osram Sylvania Inc. Light output control technique by estimating lamp efficacy as a function of temperature and power

Also Published As

Publication number Publication date
CA2489226A1 (en) 2005-08-24
GB2411518A (en) 2005-08-31
GB2411518B (en) 2007-10-03
DE102005007092A1 (de) 2005-09-08
HU0500240D0 (en) 2005-04-28
JP4950427B2 (ja) 2012-06-13
JP2005243637A (ja) 2005-09-08
GB0502510D0 (en) 2005-03-16
US20050184632A1 (en) 2005-08-25
HUP0500240A2 (hu) 2005-12-28
NL1028363C1 (nl) 2005-08-26

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